659963405 has 4 divisors (see below), whose sum is σ = 791956092. Its totient is φ = 527970720.

The previous prime is 659963399. The next prime is 659963417. The reversal of 659963405 is 504369956.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103286569 + 556676836 = 10163^2 + 23594^2 .

It is not a de Polignac number, because 659963405 - 2⁸ = 659963149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 659963405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65996336 + ... + 65996345.

It is an arithmetic number, because the mean of its divisors is an integer number (197989023).

Almost surely, 2^659963405 is an apocalyptic number.

It is an amenable number.

659963405 is a deficient number, since it is larger than the sum of its proper divisors (131992687).

659963405 is a wasteful number, since it uses less digits than its factorization.

659963405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131992686.

The product of its (nonzero) digits is 874800, while the sum is 47.

The square root of 659963405 is about 25689.7529182357. The cubic root of 659963405 is about 870.6426770231.

The spelling of 659963405 in words is "six hundred fifty-nine million, nine hundred sixty-three thousand, four hundred five".